Injector



(Model.) zsheensj-,sneen 1.

W. E. DODGE.

INJECTOR.

No. 478,741. Patented July 12, 1892.

(Model.)

WTESSE'S:

Pinna W W. E. DODGE.

'2' Sheets-Sheet; 2.

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UNITED STATES PATENT OFFICE.

IVALTER E. DODGE, OF EVERETT, MASSACHUSETTS.

`INJlaoTon.

S ECIFICATION forming part of YLetters Patent No. 478,741, dated July12, 1892.

Application filed April 1, 1892.? Serial No. 427,318. (Model.) i i Toall whom, it may concern:

Be it known that I, WALTER E. DODGE, of Everett,in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in Injectors, of which the following is aspecification.

This invention relates to injectors of the f type intended for use insupplying locomotive-boilers with water for generating steam; and it hasfor its object to provide an instrument of this class which embodies inits construction certain improvements tending to make the same morecompact in space and convenient of operation and embodying features ofconstruction whereby the parts comprising the Asame may be convenientlyldetached and assembled when so desired.

To these ends the invention consists in the improvements which I willnow proceed to describe.

In the accompanying drawings, forming part of this specitication,Figurel represents a side elevation of an injector embodying my improvements,a portion of the same being broken out. Fig. 2 represents a verticallongitudinal section of the same. Fig. 3 is an elevation of the rear endof the same, looking in the direction of the arrow shown in Fig. 1.

The same letters and numerals of reference indicate the same parts inall the'gures.

It is usually the practice in attachinginjectors of this class to thelocomotive-boiler to place the same so that the operator may readilygrasp the handle by which the instrument is operated, and it is usuallyplaced in front of the seat of the engineer or fireman and attached tothe boiler of the engine,with about one-half of the injector projectinginto the cab. It will be seen, therefore, that it is of importance thatthe operative parts should occupy as limited a space as possible.

The principle upon which the injector operates being common and wellknown, I will simply specify the parts for the sake of clearness ofillustration.

The main body of the injector is composed of two parts a a', the outerportion cz. being attached to the portion d by bolt-s or studs in lugs bb on said portions, the object being to enable them to Vbe readilyseparated to permit access to thev interior and to render the conereadily detachable therefrom. h is the steam-cone, c the delivery orcombining cone,

m the Waste-valve, 3 the steam-inlet, and 4 the water-inlet, of aninjector comprising my impr0vements,these parts being ofordinaryconstruction form no part of my invention.

The rear end of the main portion d is provided with an annular openingor socket, into which is fitted an annular flange f on a sleeve or glandf. Said sleeve or gland has formed upon its exterior lugs g, by which itis secured to the main portion a by bolts or studs secured to lugs g onsaid main portion, the

varrangement being such that the ready detachment of said sleeve permitseasy access to the cone h, which is provided with holes t' (see dottedlines in Fig. 2) for the reception of a suitable wrench, whereby saidcone may be removed from its screw-threaded connec- `tion with the mainbody a.

j represents au operating-lever pivoted at la to a forked arm Z, whicharm is pivoted at f m to a fin or projection n, formed on the gland f.The arm l as thus arranged forms a fulcrum, of which theoperating-handle is the lever for the operation of the movable parts.The lower portion of said lever is yoke-shaped, as shown in Fig. 3, sothat it may operate upon its pivot without contact with movable parts ofthe machine.

The operating-fever has formed upon its upper end a handle-shapedportion adapted to contain a pawl 0, arranged to'be operated by a leverp, pivoted at 1 to ears r r on said handle, the upper portion of thepawl being Y.

provided with a slot s, which receives the upper end of the lever p, aswill be understood by reference to Fig. 2,tl1e latter being held in theposition shown by a spring t, suitably arranged to exert pressurethereon, as shown in the above-mentioned figure.

' u represents a guide secured to a lug v, formed on the gland f. Theupper side of said guide is provided with notches w, adapted to engagethe pawl o for the purpose of regulating the feeding capacity of themachine. Fitted to slide upon said guide is a'sleeve c', having in itsupper side a slot d to receive the pawl o. Said sleeve has formed uponits under side an arm or yoke e', which projects downwardly and forms aconnection with the operative parts of the machine, as will be presentlyexplained. The arm or yoke e is ICO connected with the lever at h', andwhen said lever is moved in either direction said arm is movedtherewith.

t" represents the starting-stem rod, which is suitably connected to thecentral portion of the arm e and is moved therewith to open or close thestarting-valvej".

7a represents the valve for regulating the water-supply. Said valve isconnected with the lower portion of the arm e by a screw; threaded stemZ', passing therethrough, the arrangement being such that when the valvehas been opened by the lever sufiiciently to start the injector thesupply of water maybe regulated independently of the lever by turningsaid stem in the proper direction to open and close the valve-opening,as will be understood by referring to Fig. 2.

By the arrangement shown and described for operating the injector I amenabled to economize valuable space and increase the efficiency of theinjector.

fm represents the Waste-valve, which isoperated in connection with thelever j by a connecting-rod e in a well-knownmannerthat is, when thelever is moved to the opposite position to that shown in Fig. 2 thevalve is raised from its seat by the screw-threaded spindle n and closedby reversing the movement, as shown in the above-mentioned gure. Thisvalve is subjected to wear and is liable to become worn'to such anextent that the movement of. the operating-rod is not sufficient to seatit, and hence it becomes leaky, which in cold Weather is a greatinconvenience.

To obviate the foregoing objections, I have constructed the valve mseparately from lthe spindle 'a' and have secured said valve to saidspindle by a screw-threaded connection, together with a jam-nut o', sothat the valve can easily be adj usted on said spindle to compensate forWear.

In arranging the pawl 0 in the interior of the handle I am enabled touse a comparatively short guide u. The practice has been heretofore, asin the case of the Sellers injector, to so locate the pawl as to requirea much longer guide, which is an objectionable feature in devices ofthis class.

I claiml. In an injector for feeding boilers, the combination, with thecasing and guide-rod, of a sleeve adapted to slide upon said guiderodand an arm or exten sion formed upon said sleeve, provided with meansfor connecting the steam and water valves to said arm for thesimultaneous operation of said valves, as set forth.

2. In an injector, the combination, with the 6o notched guide-rod u, thesleeve d', adapted to slide thereon, and the downwardly-projecting arme', formed upon said sleeve, as described, of the yoke-shaped leveradapted to operate said arm and sleeve and containing a holding-pawl inits interior, as set forth.

3. The combination, with the Water-inlet of the casing and With theWater-supply valve,

of the threaded stem Z', connected with the lower portion of the arm e',whereby said valve 7o may be regulated to open and close theWater-supply opening, and the sliding sleeve supporting said arm, as setforth.

4. In a boiler-feeding injector, the combination, with the necessaryoperative parts, in-

cluding the casing, the steam-valve, and the water-valve, of stems forsaid valves,y located side by side and parallel with each other, an armor yoke connecting the said stems, means for moving said arm or yoke tosimultane- 8o..

ously adjust said valves, and means for locking the arm or yoke to holdthe valves in any position to which they may be adjusted, as set forth.

5. In a boiler-feeding` injector, the combination, with the necessaryoperative parts, including the casing, the steam-valve, and thewater-valve, of stems for said valves, located side by side and parallelwith each other, an

operating-lever, a connection between said Ie- 9c ver and the stems ofsaid valves,whereby the valves may be simultaneously operated, and .jmeans for locking said lever to hold the v'alvfes.

in different positions, as set forth.

6. In aboiler-feeding injector, the combition, with the necessaryoperative parts, the casing having the steam-valve and the Watervalve,of stems for said valves, located side by side and parallel with eachother, the stem of the water -valve being screw-threadedl at Ioo theexterior of the casing, an arm oryoke connecting the stems of saidvalves, said yoke having an internally-threaded socket engaged with saidthreaded stem, whereby the Watervalvemay be adjusted independently,means for moving said arm or yoke to simultaneously adjust the twovalves, and means for locking the arm or yoke to hold thevalves in anyposition to which they may be adjusted, as

Set fOlth. U0

lVitnesses:

M. W. J AoKsoN, A. D. HARRISON.

